How to Use the Foreach Statement in PHP

PHP has several conditional and loop statements that have been part of the language since its creation. Unlike them, the foreach statement was introduced in PHP later, influenced by other programming languages that used foreach for years. Unlike the other conditional and loop statements, the foreach statement is used only on arrays.

Instructions

Difficulty: Challenging

Things You’ll Need:

• PHP IDE or a text editor
• Web server (preferably Apache)
• MySQL database server, configured for work with PHP
• PHP 5

Use the Foreach Statement in PHP

1. Create the array:
   $arr = array(1, 2, 3, 4);
2. Write the condition:
   foreach ($arr as $i => $value)
3. Write the action to be performed. In this case, the action is to multiply the initial value by 10: {
$arr[$i] = $value * 10;
}

Check the Statement

4. Check your code for syntax errors.
5. Make sure your array has the following values: 10, 20, 30, 40.

Tips & Warnings

• The foreach command has two correct syntaxes:foreach (array_expression as $value) and foreach (array_expression as $key => $value). Use the one you prefer.
• Pay very careful attention to the syntax of the foreach statement.